Editorial Technical Reference

Gearbox / Speed Reducer

This page explains how Gearbox / Speed Reducer is classified within Machinery and Equipment Manufacturing. Technical values and manufacturer relationships are research references; confirm the current specification and supplier evidence for each order.

Technical Definition & Core Assembly

A mechanical component that reduces input speed while increasing torque, used within oscillation drive systems.

Representative product image. Confirm appearance and specifications with the manufacturer.

Product Specifications

Technical details and manufacturing context for Gearbox / Speed Reducer

Definition
A gearbox or speed reducer is a critical component of an Oscillation Drive Unit that transmits rotational power from the motor to the oscillation mechanism. It precisely controls the speed reduction ratio to achieve the required oscillation frequency and amplitude for applications such as vibrating screens, conveyors, or processing equipment. This directory entry covers gearboxes designed for oscillation drives, with a focus on their role in converting high-speed motor input into controlled, lower-speed output that drives the oscillating motion. The gearbox is selected based on the driven load, service factor, and required output torque, with rated power ranging from 0.12 to 55 kW, reduction ratios from 5 to 100, and output torque from 50 to 2000 N·m. Input speeds typically range from 750 to 3000 rpm, and efficiency is between 92% and 98%. Backlash is kept at or below 0.1° per DIN 3967 for precision applications, and noise levels are limited to 70 dB(A) per ISO 8579-1. Operating temperature ranges from -20°C to 60°C, and protection class varies from IP54 to IP65 per IEC 60529, with IP65 recommended for dusty or washdown environments. Housing materials include cast iron (e.g., HT250 per GB/T 9439) for strength and damping, or aluminum for weight reduction. Weight ranges from 15 to 200 kg, affecting mounting structure and handling. Materials used in construction include cast iron, steel alloys, and bronze for bushings or bearings. These values are directory reference ranges and must be confirmed for the specific model and application with the legal manufacturer or supplier. Always verify model-specific values and standards before procurement.
Working Principle
The gearbox operates by using a system of gears (spur, helical, worm, or planetary) to transfer rotational motion from a high-speed input shaft to a lower-speed output shaft. The gear ratio determines the speed reduction and torque multiplication, enabling the oscillation drive to generate controlled back-and-forth motion. The input shaft is connected to the motor, and the output shaft drives the oscillation mechanism. The gear mesh transmits power while reducing speed, and the housing supports the shafts and maintains alignment. Lubrication is essential to reduce friction and heat, and the gearbox must be operated within its specified temperature range to maintain lubricant viscosity. The efficiency of the gearbox reflects energy losses due to friction and gear mesh, and higher efficiency reduces energy loss and heat generation. The backlash, or play between gear teeth, is critical for precision positioning and is minimized to ≤0.1° per DIN 3967. The gearbox is designed to handle the specified torque and speed, and proper selection ensures reliable operation within the oscillation drive system.
Common Materials
Cast iron, Steel alloys, Bronze (for bushings/bearings)
Technical Parameters
ParameterTypical rangeNotes & selection driver
Rated Power0.12–55 kWSelect based on driven load and service factor.
Reduction Ratio5–100Higher ratios reduce output speed further.
Output Torque50–2000 N·mEnsure it exceeds required torque with safety margin.
Input Speed750–3000 rpmTypical motor speeds; higher speeds may require cooling.
Efficiency92–98 %Higher efficiency reduces energy loss and heat.
Backlash≤0.1 °Critical for precision positioning applications.DIN 3967
Noise Level≤70 dB(A)Measured at 1m; lower is better for indoor use.ISO 8579-1
Operating Temperature-20–60 °CLubricant viscosity changes outside this range.
Protection ClassIP54–IP65IP65 for dusty or washdown environments.IEC 60529
Housing MaterialHT250Cast iron for strength and damping; aluminum for weight.GB/T 9439
Weight15–200 kgAffects mounting structure and handling.

Ranges are indicative industry figures for RFQ preparation, not a supplier commitment. Confirm every value and standard with the legal manufacturer before ordering.

Components / BOM
  • Gears Part
    Transmit motion and torque between shafts
    Material: Steel alloy
  • Housing Part
    Enclose and protect internal components, provide mounting points
    Material: Cast iron
  • Input Shaft Part
    Receive rotational power from motor
    Material: Steel
  • Output Shaft Part
    Deliver reduced speed and increased torque to oscillation mechanism
    Material: Steel
  • Bearings
    Support rotating shafts and reduce friction
    Material: Steel with bronze/plastic cages

Applied To / Applications

This component is essential for the following industrial systems and equipment:

Industrial Ecosystem & Supply Chain Structure

Complementary Systems
Downstream Applications
Specialized Tooling

Application Fit & Sizing Matrix

Operational Limits
pressure: N/A (mechanical component, not fluid pressure)
other spec: Max input speed: 3000 RPM, Max torque: 5000 Nm, IP65 protection standard
temperature: -20°C to +120°C (standard), up to +150°C with high-temp seals
Media Compatibility
✓ Industrial lubricating oils (ISO VG 68-320) ✓ Synthetic gear oils ✓ Food-grade lubricants (H1 rated)
Unsuitable: High-concentration abrasive slurry environments without proper sealing
Sizing Data Required
  • Input speed (RPM)
  • Required output torque (Nm)
  • Required reduction ratio

Reliability & Engineering Risk Analysis

Failure Mode & Root Cause
Bearing fatigue failure
Cause: Excessive loading, improper lubrication, contamination, or misalignment leading to spalling, brinelling, or fatigue cracks in bearing components.
Gear tooth pitting and wear
Cause: Insufficient lubrication, overload conditions, surface fatigue, or abrasive contamination causing surface degradation, pitting, or progressive tooth wear.
Maintenance Indicators
  • Unusual grinding, whining, or knocking noises during operation
  • Visible oil leaks or discolored/metal-contaminated lubricant
Engineering Tips
  • Implement precision alignment during installation and periodic realignment checks to minimize abnormal loads on gears and bearings.
  • Establish a rigorous lubrication management program including correct oil viscosity, proper fill levels, scheduled oil analysis, and contamination control.

Indicative industry ranges for design and RFQ preparation. Confirm the exact figures and applicable standard with the manufacturer before specifying.

Compliance & Manufacturing Standards

Applicable Standards
ISO 1328-1:2013 (Cylindrical gears - System of accuracy) ANSI/AGMA 2000-A88 (Gear Classification and Inspection Handbook) DIN 3960 (Tolerances for cylindrical gear teeth)

Quoted from the published standard.

Manufacturing Precision
  • Bore diameter: H7 tolerance (e.g., ±0.018mm for 50mm bore)
  • Gear tooth profile: ±0.02mm from theoretical involute curve
Quality Inspection
  • Gear tooth contact pattern test (using blue compound)
  • Hardness testing (Rockwell C scale for gear teeth)

Manufacturers of Gearbox / Speed Reducer

2 companies list this product among what they make. Company figures are quoted from each company's own website; every card states where the relationship came from.

Jiangsu Guorui Hydraulic Machinery Co., Ltd.
Jiangsu, CN
Founded 1986340 plus staff120,000㎡
Listed on the company's own website · profile compiled by CNFX from public sources
Shanghai Metal Corporation
Shanghai, CN
Listed on the company's own website · profile compiled by CNFX from public sources

Manufacturer listings support early research and capability understanding. They are not certification, ranking, or transaction guarantees.

Technical documentation
Request current drawings, revision history, and a signed specification sheet.
Manufacturing capability
Verify equipment lists, process limits, capacity, and representative production evidence.
Inspection readiness
Confirm test methods, calibrated equipment, sampling plans, and traceable reports.
Supplier transparency
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Frequently Asked Questions

What is the typical reduction ratio range for this gearbox?

The reduction ratio ranges from 5 to 100, as listed in the directory. Higher ratios reduce output speed further. The specific ratio required depends on the desired oscillation frequency and amplitude for your application. Always confirm the exact ratio with the manufacturer based on your system design.

What is the maximum backlash allowed?

The maximum backlash is ≤0.1° per DIN 3967. This is critical for precision positioning applications. Lower backlash ensures accurate motion control. Verify the actual backlash value for the specific model with the supplier, as it may vary depending on gear type and manufacturing tolerances.

What protection class is available?

The protection class ranges from IP54 to IP65 per IEC 60529. IP65 is recommended for dusty or washdown environments. The appropriate class depends on your operating environment. Confirm the protection class of the specific model with the manufacturer to ensure it meets your requirements.

What materials are used in the gearbox construction?

The gearbox uses cast iron, steel alloys, and bronze for bushings or bearings. The housing material may be cast iron (e.g., HT250 per GB/T 9439) or aluminum, depending on the model. Cast iron provides strength and damping, while aluminum reduces weight. Confirm the exact materials with the manufacturer for your application.

Data Basis

Editorial classification, named public sources where available, and source-reviewed manufacturer records.

Preliminary Technical Classification
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